Fleetwood Brougham V8-307 5.0L (1989)
Knock Sensor: Description and Operation
ESC Wiring Diagram
The Electronic Spark Control (ESC) system is comprised of an ESC module, knock sensor and the ECM. As the knock sensor detects engine knock, it
sends a voltage signal to the ESC module, which sends 0 volts to the ECM. This signals the ECM to retard the timing, which eliminates detonation. As
detonation is reduced, the ECM advances the timing again in small increments.